PHP / HTML帖子无法按预期工作

时间：2016-07-07 03:47:43

标签： php html forms input currency

我是PHP的新手，并且正在使用小型货币转换器页面进行练习。我的PHP和HTML代码都在一个名为＆＃34; index.php＆＃34;：

的页面中 
<?php 
$originalAmount = $_POST["originalAmount"];
$convertedAmount = 0.00;
$currency1 = $_POST["currency1"];
$currency2 = $_POST["currency2"];
function convertCurrency($input, $origCurr, $convertCurr) {

    if ($origCurr === 1){
        if ($convertCurr === 2){
            $convertedAmount = $input * 0.78;
            return $convertedAmount;
        }
        elseif ($convertCurr === 3){
            $convertedAmount = $input * 0.90;
            return $convertedAmount;
        }
        else {
            $convertedAmount = $input;
            return $convertedAmount;
        }
    }

    if ($origCurr === 2){
        if ($convertCurr === 1){
            $convertedAmount = $input * 1.29;
            return $convertedAmount;
        }
        elseif ($convertCurr === 3){
            $convertedAmount = $input * 1.16;
            return $convertedAmount;
        }
        else {
            $convertedAmount = $input;
            return $convertedAmount;
        }
    }

    if ($origCurr === 3){
        if ($convertCurr === 2){
            $convertedAmount = $input * 0.86;
            return $convertedAmount;
        }
        elseif ($convertCurr === 1){
            $convertedAmount = $input * 1.11;
            return $convertedAmount;
        }
        else {
            $convertedAmount = $input;
            return $convertedAmount;
        }
    }
}

$convertedAmount = convertCurrency($originalAmount, $currency1, $currency2);
?>

<html>

<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Currency Converter</title>

    <!--jQuery-->
    <script         src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

    <!--Bootstrap 3-->
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

    <!--Custom CSS-->
    <link href="main.css" type="text/css" rel="stylesheet">
</head>

<body>
    <div class="container">
        <!--Header Row-->
        <div class="row page-header">
            <div class="col-xs-6">
                <h1>Currenccy Converter</h1></div>
            <div class="col-xs-6">
                <p>Add items via the input below.
                    <br>Click to mark complete (Completed Items will be marked with a green background.)
                    <br>To delete a task, Click on the X.
                    <br>Double Click to edit the item, it will be moved to the add item box</p>

            </div>

        </div>


        <!--Add Task / Input Row-->
        <div class="row">
            <div class="col-xs-12 well">
                <h2 class="text-xs-center"><?php print $convertedAmount; ?></h2>
                <form class="form-control" id="converterForm" action="index.php" method="post">        

                    <select name="currency1" id="currency1">
                        <option value="zzz">Starting</option>
                        <option value="1">USD</option>
                        <option value="2">GBP</option>
                        <option value="3">EUR</option>
                    </select>

                    <select name="currency2" id="currency2">
                        <option value="zzz">Converted</option>
                        <option value="1">USD</option>
                        <option value="2">GBP</option>
                        <option value="3">EUR</option>
                    </select>

                    <div class="form-group">
                        <label for="originalAmount" id="origLabel">Amount:</label>
                        <input id="originalAmount" type="number" value="0.00" name="originalAmount">
                        <input type="submit" id="submit" name="submit" value="SUBMIT">
                    </div>


                </form>
            </div>
        </div>

    </div>
</body>


</html>

我的问题是，它似乎无法在服务器上运行。我曾经有一个readonly输入，我试图通过php echo更新作为值，但是当我点击提交时，它不起作用。然后我用包含echo的H2元素替换了输入。

我对此页面的目标是在没有javascript / ajax的帮助下通过HTML和PHP完成所有操作。

为什么某个值中的echo不会返回$converted的值，是否有任何超级明显的理由？我宁愿使用CSS的readonly输入和样式，而不是使用H2元素，但我想其中任何一个都可行。

期待你的好人们的想法。谢谢。

2 个答案:

答案 0 :(得分：2)

问题：如果条件<div *ngIf="visible"> <div class="dashhead"> <div class="dashhead-titles"> <h6 class="dashhead-subtitle">Bootops</h6> <h3 class="dashhead-title">Role Builder</h3> </div> <div class="dashhead-toolbar"> <span class="dashhead-toolbar-divider hidden-xs"></span> </div> </div> <ul class="nav nav-bordered"> <li [class.active]="isCurrentRoute(['Environments'])"><a <li><a (click)="logout()">Logout</a></li> </ul> </div> 用于比较值和变量的类型，那么您在所有情况下都使用===。在您的情况下，===是字符串类型，您正在将字符串与数字进行比较。 $_POST['your_variable']。阅读比较运算符here

enter image description here

解决方案：使用类型转换变量或使用if ($origCurr === 1)仅比较值。 ==

答案 1 :(得分：0)

Rohit发现了这个错误的原因。我还想为转换函数提供这种替代方法，仍然需要考虑输入变量的类型。

-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-keepattributes Signature
-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-dontwarn android.support.**
-dontwarn com.instagram.common.json.**
-dontwarn com.fasterxml.jackson.databind.ext.DOMSerializer
-dontwarn com.squareup.javawriter.JavaWriter
-dontwarn com.google.common.primitives.UnsignedBytes*
-dontwarn sun.misc.Unsafe
-dontwarn javax.annotation.**
-dontwarn com.squareup.picasso.**
-dontwarn okio.Okio.**
-dontoptimize
-dontpreverify
-optimizations !code/simplification/arithmetic,!field/*,!class/merging/*

-keepattributes *Annotation*
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class com.google.vending.licensing.ILicensingService
-keep public class com.android.vending.licensing.ILicensingService
-keep public class * extends android.support.v4.app.Fragment
-keep public class * extends android.app.Fragment

-keep class android.support.v7.internal.** { *; }
-keep interface android.support.v7.internal.** { *; }
-keep class android.support.v7.** { *; }
-keep interface android.support.v7.** { *; }

# Facebook library
-keep class com.facebook.** {
   *;
}

-dontwarn com.squareup.okhttp.**


-keep class butterknife.** { *; }
-dontwarn butterknife.internal.**
-keep class **$$ViewBinder { *; }

-keepclasseswithmembernames class * {
    @butterknife.* <fields>;
}

-keepclasseswithmembernames class * {
    @butterknife.* <methods>;
}

-keepclasseswithmembernames class * {
    native <methods>;
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembernames class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

 -keepclassmembers public class * extends android.view.View {
  void set*(***);
  *** get*();
 }

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

-keepclassmembers class **.R$* {
  public static <fields>;
}
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